1367 search results for "how to import image file to R"

High performance JSON streaming in R: Part 1

November 5, 2014
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High performance JSON streaming in R: Part 1

The jsonlite stream_in and stream_out functions implement line-by-line processing of JSON data over a connection, such as a socket, url, file or pipe. Thereby we can construct a data processing pipeline that can handle large (or unlimited) amounts of data with limited memory. This post will walk through some examples...

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Analyzing coverage of R unit tests in packages – the {testCoverage} package

November 5, 2014
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Analyzing coverage of R unit tests in packages – the {testCoverage} package

By Andy Nicholls – Head of Consulting, UK Introduction Testing is a crucial component in ensuring that the correct analyses are deployed. However it is often considered unglamorous; a poor relation in terms of the time and resources allocated to it in … Continue reading →

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tagcloud: creating tag / word clouds

November 5, 2014
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tagcloud: creating tag / word clouds

May I present my new package: tagcloud. Tag clouds is for creating, um, tag clouds (aka word clouds). It is based on the code from the wordcloud package, but (i) has no tools for analysing word frequencies, instead (ii) focuses on doing better tag clouds. As to (ii), it adapts to the geometry of the

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Analyzing coverage of R unit tests in packages – the {testCoverage} package

November 4, 2014
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Analyzing coverage of R unit tests in packages – the {testCoverage} package

(guest post by Andy Nicholls and the team of Mango Business Solutions) Introduction Testing is a crucial component in ensuring that the correct analyses are deployed. However it is often considered unglamorous; a poor relation in terms of the time and resources allocated to it in the process of developing a package. But with the

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Creating More Effective Graphs

November 4, 2014
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Creating More Effective Graphs

A few years ago I ordered a copy of the 2005 edition of Creating More Effective Graphs by Naomi Robbins. Somewhat shamefully I admit that the book got buried beneath a deluge of papers and other books and never received the attention it was due. Having recently discovered the R Graph Catalog, which implements many

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Let’s Do Some MORE Hierarchical Bayes Choice Modeling in R!

November 3, 2014
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Let’s Do Some MORE Hierarchical Bayes Choice Modeling in R!

R enables us to "test drive" statistical models by running simulations and analyzing actual data. We can look at the output and get some sense of how the whole thing works. The goal is to provide a realistic application that is not too difficult to fol...

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R 3.1.2 release (and upgrading for Windows users)

November 3, 2014
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R 3.1.2 release (and upgrading for Windows users)

R 3.1.2 (codename “Pumpkin Helmet“) was released last week. You can get the latest binaries version from here. (or the .tar.gz source code from here). The full list of new features and bug fixes is provided below. Upgrading to R 3.1.2 on Windows If you are using Windows you can easily upgrade to the latest version of R using the installr

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Leveraging R for Job Openings for Economists

November 1, 2014
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Leveraging R for Job Openings for Economists

Quite a few people emailed me regarding my post on Econ Job Market. This post is about how you can use very basic and simple R tools to help you in sorting through the Job Openings for Economists list from the American Economic Association.This definitely helped me in developing my spreadsheet of places to apply

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Mirror, mirror on the wall, which is your favorite German car brand in the world…

October 30, 2014
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Mirror, mirror on the wall, which is your favorite German car brand in the world…

Or how to create a world map in R with survey data, World Bank indicators, ggplot2 and rworldmap by timwinke When people think about Germany, what comes to their mind? Oktoberfest, ok – but Mercedes might be second or BMW … Continue reading →

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R Class for Wildfire Scientists

October 29, 2014
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R Class for Wildfire Scientists

This entry is part 14 of 14 in the series Using RMazama Science has just finished creating class materials on using R for the AirFire team at the USFS Pacific Wildland Fire Sciences Lab in Seattle, Washington. This team of …   read more ...

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